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300+ Free NJ CDL Doubles/Triples Practice Questions

Pass your New Jersey CDL Doubles and Triples Endorsement Test exam on the first try — instant access, no signup required.

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ArticleBest Reflective Warning Triangles for CDL Pre-Trip Inspection Test 202611 min read
2026 Statistics

Key Facts: NJ CDL Doubles/Triples Exam

20

NJ CDL double/triple trailer test questions listed in the manual

NJ MVC Commercial Driver License Manual

80%

minimum passing score for CDL knowledge tests

NJ MVC CDL Tests and 49 CFR 383.135

$125

NJ MVC CDL test fee

NJ MVC CDL Tests

7 days

knowledge retake wait after failure

NJ MVC CDL Tests

Class A

license class NJ MVC lists as required for double/triple trailer operation

NJ MVC CDL Endorsements

3/1/1998

converter dolly build date after which ABS is required by the NJ CDL Manual

NJ MVC Commercial Driver License Manual Section 7.1.8

NJ MVC lists T as the endorsement for vehicles pulling two or three trailers and requires a Class A CDL for this vehicle type. The NJ CDL Manual lists the double and triple trailer test as 20 questions, while MVC publishes an 80% CDL knowledge-test passing score, a $125 Examination Test Receipt fee, a seven-day retake wait after a failed knowledge test, and a 180-day Test Receipt renewal point. FMCSA and 49 CFR 383.93 classify Double/Triple Trailers as a knowledge-test endorsement.

Sample NJ CDL Doubles/Triples Practice Questions

Try these sample questions to test your NJ CDL Doubles/Triples exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 300+ question experience with AI tutoring.

1Which statement is correct about T endorsement for New Jersey CDL doubles/triples operation?
A.T is the NJ endorsement for operating CMVs pulling double or triple trailers where legal
B.It is a passenger bus loading rule
C.It applies only to tank vehicles
D.It waives the CDL knowledge test
Explanation: T is the NJ endorsement for operating CMVs pulling double or triple trailers where legal. This is based on NJ MVC CDL endorsements page.
2Which statement is correct about license class for New Jersey CDL doubles/triples operation?
A.It is a passenger bus loading rule
B.NJ MVC lists Class A as required for double/triple trailer operation
C.It applies only to tank vehicles
D.It waives the CDL knowledge test
Explanation: NJ MVC lists Class A as required for double/triple trailer operation. This is based on NJ MVC CDL endorsements page.
3Which statement is correct about test length for New Jersey CDL doubles/triples operation?
A.It is a passenger bus loading rule
B.It applies only to tank vehicles
C.The NJ CDL Manual lists the double/triple trailer test as 20 questions
D.It waives the CDL knowledge test
Explanation: The NJ CDL Manual lists the double/triple trailer test as 20 questions. This is based on NJ MVC Commercial Driver License Manual.
4Which statement is correct about passing score for New Jersey CDL doubles/triples operation?
A.It is a passenger bus loading rule
B.It applies only to tank vehicles
C.It waives the CDL knowledge test
D.NJ MVC CDL knowledge tests require at least 80 percent correct
Explanation: NJ MVC CDL knowledge tests require at least 80 percent correct. This is based on NJ MVC CDL tests page and 49 CFR 383.135.
5Which statement is correct about FMCSA testing for New Jersey CDL doubles/triples operation?
A.FMCSA lists Double/Triple Trailers as a knowledge-test-only endorsement
B.It is a passenger bus loading rule
C.It applies only to tank vehicles
D.It waives the CDL knowledge test
Explanation: FMCSA lists Double/Triple Trailers as a knowledge-test-only endorsement. This is based on FMCSA CDL driver guidance and 49 CFR 383.93.
6Which statement is correct about converter gear for New Jersey CDL doubles/triples operation?
A.Leave the dolly component loose until highway speed
B.Converter gear on a dolly is a coupling device with one or two axles and a fifth wheel
C.Use the dolly only as cargo securement
D.Ignore the dolly if lights work
Explanation: Converter gear on a dolly is a coupling device with one or two axles and a fifth wheel. This is based on NJ CDL Manual Section 7.2.1.
7Which statement is correct about dolly positioning for New Jersey CDL doubles/triples operation?
A.Leave the dolly component loose until highway speed
B.Use the dolly only as cargo securement
C.The dolly should be in front of the second trailer and in line with the kingpin
D.Ignore the dolly if lights work
Explanation: The dolly should be in front of the second trailer and in line with the kingpin. This is based on NJ CDL Manual Section 7.2.1.
8Which statement is correct about pintle hook for New Jersey CDL doubles/triples operation?
A.Leave the dolly component loose until highway speed
B.Use the dolly only as cargo securement
C.Ignore the dolly if lights work
D.The pintle hook must be locked after the dolly is hooked to the front trailer
Explanation: The pintle hook must be locked after the dolly is hooked to the front trailer. This is based on NJ CDL Manual Section 7.2.1.
9Which statement is correct about converter dolly ABS for New Jersey CDL doubles/triples operation?
A.Converter dollies built on or after March 1, 1998, are required to have ABS
B.Leave the dolly component loose until highway speed
C.Use the dolly only as cargo securement
D.Ignore the dolly if lights work
Explanation: Converter dollies built on or after March 1, 1998, are required to have ABS. This is based on NJ CDL Manual Section 7.1.8.
10Which statement is correct about pintle hook hazard for New Jersey CDL doubles/triples operation?
A.Leave the dolly component loose until highway speed
B.Never unlock the pintle hook with the dolly still under the rear trailer because the tow bar may fly up
C.Use the dolly only as cargo securement
D.Ignore the dolly if lights work
Explanation: Never unlock the pintle hook with the dolly still under the rear trailer because the tow bar may fly up. This is based on NJ CDL Manual Section 7.2.2.

About the NJ CDL Doubles/Triples Exam

The New Jersey CDL Doubles and Triples Endorsement Test is the NJ MVC knowledge test for drivers who need the T endorsement to operate commercial motor vehicles pulling two or three trailers where legal. NJ MVC lists T as the Double and Triple Trailer endorsement and states that a Class A license is required for this vehicle type. NJ CDL Manual Section 7 covers pulling double/triple trailers, preventing rollover, crack-the-whip, smooth control, space management, adverse conditions, converter dollies, coupling twin trailers, uncoupling, triple trailer procedures, fifth wheel and kingpin checks, shut-off valve positions, glad hands, light cords, safety chains, air flow to all trailers, tractor protection valve checks, trailer emergency brakes, and service brake checks. FMCSA and 49 CFR Part 383 identify the doubles/triples endorsement as knowledge-test-only.

Assessment

New Jersey MVC administers a separate doubles/triples endorsement knowledge test; the NJ CDL Manual lists the double and triple trailer test as 20 questions. Federal CDL rules require a knowledge test for the Double/Triple Trailers endorsement under 49 CFR 383.93.

Time Limit

Computer-based MVC knowledge testing; no separate public time limit found in official NJ MVC sources

Passing Score

80% minimum on CDL knowledge tests

Exam Fee

$125 CDL test fee for the NJ MVC Examination Test Receipt process (New Jersey Motor Vehicle Commission (MVC))

NJ CDL Doubles/Triples Exam Content Outline

NJ MVC CDL process

New Jersey T Endorsement Context

T endorsement purpose, Class A CDL requirement, Examination Test Receipt, $125 CDL test fee, 20-question doubles/triples test listing, 80% passing score, seven-day knowledge retake wait, and 180-day Test Receipt renewal point.

NJ CDL Manual Section 7.1

Safe Operation and Stability

Rollover prevention, crack-the-whip, rearward amplification, last-trailer risk, smooth steering, looking far ahead, following distance, traffic gaps, lane changes, adverse conditions, mountain driving, and parking choices.

NJ CDL Manual Section 7.2.1

Converter Dolly and Coupling

Converter gear definition, dolly brake release, dolly support, pintle hook lock, rear trailer brake securement, wheel chocks, trailer height, dolly fifth wheel coupling, tug test, visual check, safety chains, air hoses, and light cords.

NJ CDL Manual Section 7.2.2-7.2.3

Uncoupling Doubles and Triples

Straight and level parking, parking brakes, chocking, landing gear, shut-off valves, securing disconnected lines, releasing dolly fifth wheel, pulling dolly out slowly, lowering dolly landing gear, pintle hook hazards, and triple uncoupling order.

NJ CDL Manual Section 7.3

Inspection Checklist

Lower and upper fifth wheel, kingpin, locking jaws, release arm, safety latch, sliding fifth wheel, air and electric line condition, landing gear, shut-off valve positions, converter dolly drain valve, spare tire, pintle-eye, safety chains, and light cords.

NJ CDL Manual Section 7.4 and 49 CFR 383.111

Air Brakes and Emergency Handling

Air flow to all trailers, rear emergency and service line checks, open shut-off valve troubleshooting, tractor protection valve, trailer emergency brake test, trailer service brake test, converter dolly ABS, air-line failures, trailer sway, tire blowouts, downgrades, and evasive maneuvers.

How to Pass the NJ CDL Doubles/Triples Exam

What You Need to Know

  • Passing score: 80% minimum on CDL knowledge tests
  • Assessment: New Jersey MVC administers a separate doubles/triples endorsement knowledge test; the NJ CDL Manual lists the double and triple trailer test as 20 questions. Federal CDL rules require a knowledge test for the Double/Triple Trailers endorsement under 49 CFR 383.93.
  • Time limit: Computer-based MVC knowledge testing; no separate public time limit found in official NJ MVC sources
  • Exam fee: $125 CDL test fee for the NJ MVC Examination Test Receipt process

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

NJ CDL Doubles/Triples Study Tips from Top Performers

1Memorize the New Jersey logistics first: T endorsement purpose, Class A requirement, 20 questions, 80% passing score, $125 test fee, seven-day retake wait, and 180-day Test Receipt renewal point.
2Treat converter dolly questions as sequence questions: secure the rear trailer, position the dolly, lock the pintle hook, secure supports, align with the kingpin, check coupling, then connect safety chains, air hoses, and light cords.
3For uncoupling questions, start with straight and level ground, parking brakes, wheel chocks when needed, landing gear support, shut-off valves, and secured lines before releasing the dolly fifth wheel.
4For inspection questions, focus on fifth wheel mounting and grease, no space between fifth wheel plates, jaws around the kingpin shank, release arm seated, shut-off valve positions, pintle-eye, safety chains, glad hands, and light cords.
5For handling questions, remember that the last trailer is most likely to roll because abrupt steering is amplified rearward; slow before curves and make smooth steering and braking inputs.
6For air brake questions, the safest answers usually verify air reaches the rear of every trailer and confirm tractor protection, trailer emergency brakes, and service brakes before driving.

Frequently Asked Questions

How many questions are on the New Jersey CDL doubles/triples endorsement test?

The New Jersey CDL Manual lists the double and triple trailer test as 20 questions.

What score do I need to pass the New Jersey CDL doubles/triples test?

NJ MVC states CDL knowledge tests require at least 80% correct. Federal CDL rules in 49 CFR 383.135 also use an 80% minimum for knowledge tests.

What does the T endorsement cover in New Jersey?

NJ MVC lists T as the Double and Triple Trailer endorsement, needed for operators of vehicles pulling two or three trailers.

Do I need a Class A CDL for doubles and triples in New Jersey?

Yes. NJ MVC states a Class A license is required to operate the double and triple trailer vehicle type.

Is the doubles/triples endorsement knowledge-test-only?

Yes. FMCSA lists Double/Triple Trailers (T) as knowledge-test-only, and 49 CFR 383.93 requires a knowledge test for this endorsement.

Is ELDT required just to add the T doubles/triples endorsement?

FMCSA endorsement-specific ELDT requirements apply to first-time H, P, and S endorsements, not T alone. ELDT may still apply to a first-time Class A or Class B CDL applicant or Class B-to-A upgrade before the skills test.